The release of the Virginia Tech killer's videos is a "social catastrophe," according to Dr. Michael Welner, who is chairman of The Forensic Panel and an associate professor of psychiatry at the New York University School of Medicine. "This is psychologically toxic. It's toxic to the victims. It's toxic to the families," he says.

Dr. Welner says that studying the videos will not help us recognize potential warning signs because it doesn't depict how the gunman was in everyday life. "It's a fiction, and even as a psychiatrist, you can't learn from that because it's phony," Dr. Welner says. "You can't see how disorganized and irrational [he is] because he's written a script. You don't see what doesn't connect."